Thomas welch



NITED STATES I Rail-nvrY OFFICE.

THOMAS 'WELOl-I, OF NEV YORK, N. Y.

WINDOW-CLEANING CHAIR OR IPLATFORIVI.

SPECIFICATION forming part of Letters-Patent No. 590,924, dated lSeptember 28, 1897.

Application led May 20, 1897.

serai No. 637,458. oro model.)

-To all whom t may concer/1..-

Be it known that I, THOMAS VELCH, of New York city, in the county and State of New York, have invented a new and Improved XVindow-Oleaning Chair or Platform, of which the following 'is a full, clear, and exact description.

The object of my invention is to provide a window-cleaning chair or platform which will be safe, simple, durable, and economie `and which may be securely fastened to any window in a convenient and expeditious manner.

A further object of the invention is to provide a window-cleaning chair or platform which maybe readily carried from one window to another or to any portion of a building'.

The invention consists in the novel construction and combination of the several parts, as will be @hereinafter fully setforth,

and pointed out in the claims.

Reference is to be had to the drawings, forming a part of this specification,

in which similar characters of reference indicate correspondingfparts in all the figures.

Figure 1 is a horizontal section through a window-frame, the section being taken on the' line 1 1 of Fig. V2, and also a plan View of the window-cleaning chair in position in the window-frame, a portion of the chairbeing broken away. Fig. 21s an outside view of a portion of the window-frame and a rear elevation of the window-cleaning chair in position inthe frame. Fig. 3 is an enlarged detail sectional view of the adjusting device for the locking mechanism of the chair, and Fig. Ltis a transverse section taken substantially on the line 4 4: of Fig. 1.

A represents a window-frame having the usual inside sill 10 and in connection with which an outside sill 11 is used, the said frame being also provided with the usual division-beads 12, separating the sash-grooves. In the drawings I have illustrated the appli'- cation of the invention to a chair which consists of a seat 13 andaback 14, a supportingpost 15 being attached to the bottom portion of the seat at the back adapted to rest upon the outer sill 11. An extension-bar 16 is attached to the front portion of the seat. This bar contains the adjusting mechanism and extends usually beyond the sides of the seat. The extension-harm of the seat is proaccompanying vided with a longitudinal chamber 17, having tie or cross bars at each side of the central portion of said chamber and other cross-bars 19 between said bars 18 and the ends of the chamber.

An opening 2O is made i-n the top and the bottom of the extension of the seat, and

usually these openin gs are of elliptical shape,

as illustrated. At the opening 20 an elliptical nut 21is exposed, terminating at each of l vitsends in a tube 22, located within said chamber. The tubes 22 are made somewhat thick at their ends, and in the end portion of one of said tubes an opening having a righthand thread is provided and at the opposite end an opening having a left-hand thread in its wall is made. The tubularextensions of the nut '2l are passed through openings in the partitions 18, and the said tubular extensions of the n ut have 'annular shoulders 23 formed thereOmengaging with the inner faces of the said' partitions'lS, as shown in Fig. 3, .whereby t-he nut and its tubular extensions may' be turned, yet these'parts will be vh eld against end movement. The peculiar shape is givento the nut 21 in order that it shall not interferewith a person seated -in the chair.

In connection with the extension of the chair two clamping-shoes 24: are employed, and each shoe is provided with a recess 25, s o arranged as to receive a parting or dividing bead of the sash-grooves of the Windowframe, as illustrated in Fig. 1, and the shoes are of such length that they will iit snuglyin the said grooves, having bearing against the outer stop-bead,`as we'll asagainst the inner stop-bead ofthe frame. A screw 26 issecured to each shoe, usually at its center, and the thread of the screw on one shoe is a righthand thread, While the thread of the screw on the other shoe is a left-hand one. These screws 26 are adapted to enter the openings in the extensions of the nut 2l, havin g correspondingly-threaded walls.

Guide-rods 27 are located at each side of each'screw 26, and these guide-rods and likewise the screws are loosely passed through openings in end plates 28, attached to the extensions of the chair and through corresponding openings made in the partitions 19 in the chamber 17.

Preferably near each end of the extension- ICO ' section of each clamp B terminates in a hook 33 or is so formed that it may engage with the inner longitudinal edge of the inner Window-sill 10.

It is obvious that by turning the adjustingnut 2l in one direction the shoes Will be forced to an engagement With the sides of the Window-frame, and by turning the nut 3l in an opposite direction the shoes will be drawn inward and the chair may be disconnected from the window. The clamping-shoes 24 are usually sufticient to hold the chair in position in the window-frame, the clamps B being simply employed as additional means of safety. It will be understood that the shoes 24 may be so shaped and be of such dimen; sions as to iit between the stop-beads of any Window-frame.

I desire it to be understood that any equivalent of the screw-adj Listing device may be employed without departing from the spirit of the invention.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent-- l. The combination With a Window chair or platform, of a chambered extension thereon, a tube mounted to rotate in the extension, the said tube having threaded portions at its ends,'rods having threads engaging the screwthreads of the tube, and slices on the outer ends of the rods, the said shoes being recessed to receive the parting-beads of a Window casing, substantially as specified.

2. The combination with a window chair or platform, of a chambered extension thereon, a tube mounted to rotate in the extension, a nut on the tube and projected through top and bottom openings in the extension, means for preventing longitudinal movement of the tube relatively to the extension, screw-rods operated by the tube and shoes on the outer ends of the rods, substantially as specified.

3. The combination with a Window chair or platform, of a chambered extension thereon, a tube mounted to rotate in the extension, screw-threaded rods operated by the tube, shoes on the outer ends of said rods and guide=rods extended from the shoes through holes in end plates on the extension, substantially as specified.

4. The combination with a window chair or platform, of laterally-movable rodsshoes on said rods for engaging a window-casing, adjustable clamps for engaging the inner side of a Window-casing, and guide-bars for the clamps, substantially as specified.v

5. The combination 'with a window chair or platform, of clamps pivotally connected thereto, each clamp consisting of two Sections, a screw for adjusting one section 1ongitudinally with relation to the other section, and guide-rods for the adjustable section, substantially as specified.

THOMAS VELCII. lVitnesses:

ROBERT A. SIMPSON, HERMAN HOLTMAN. 

